Duplex mismatch error between switch and AP2800 Series

[eeebbunee]

Hello Professionals & Engineers,

I am having a Duplex mismatch issues between switch 2960X and AP2800 Series.

Wireless controller - 2504 and this cares all of APs I have.

(WLC2504 - 8.3.143 / switch - 15.2(3r)E1 / AP2802I-B-K9)

Logs on my switch are full of 'Duplex mismatch errors' and I am not able to find 'mismatch'.

.Jan 25 2022 18:15:44: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet1/0/46 (not half duplex), with MBC_IDF_2802_AP_08 GigabitEthernet0 (half duplex).

Weird thing is switch port interface (Gi1/0/46) is configured as 'auto' for duplex and speed. (a-full / a-1000)

AP configuration shows up like below obviously.

[Leo Laohoo · Accepted solution]

FN - 70252 - Inaccurate "CDP-4-DUPLEX_MISMATCH" Messages Are Logged on AP Switchports